Re: Columbus, eclipse, Regiomontanus

On Feb 16, 12:40 pm, "a425couple" <a425cou...@xxxxxxxxxxx> wrote:
tryhttp://www.msnbc.msn.com/id/23073963/
Columbus, eclipse, Regiomontanus

OK, obviously I'm at least momentarily having a
gray matter disconect. Anyone care to help me out?

At Columbus time, enough learned people had done
their observations and knew the world/earth was round,
and their math correctly and knew it's size.
So he had the book, and good enough solid astro/math info
to know of eclipses ahead of time, -----

How could Columbus still been of the mistaken
belief he had reached the far east????
(when he only 1/2 way there?)
(i.e. if the math is good for one -shouldn't it be
good for both aspects?)

Mayhap he lied to get the gig. But Samuel Eliot Morrison says he had
two opportunities to get his longitude through known eclipse times and
an almanac and "muffed" both, as did everybody else for a century.

Example, in 1541 there was a mighty effort to determine the longitude
of Mexico City, the derived location was 120 degrees 38 minutes west
of Toledo an error of more than 25 degrees. Correct 95 12.
.

Relevant Pages

  • Re: Why only crap in this NG? (was Wolter claims ...)
    ... The only european with details accounts of the western ... >> longitude without a ships clock. ... I gave you the example showing why it doesn't and what Columbus ... All he had to know what what time an eclipse took place. ...
    (sci.archaeology)
  • Re: Why only crap in this NG? (was Wolter claims ...)
    ... >>> what Columbus did. ... All he had to know what what time an eclipse ... Columbus twice claimed to have found his longitude by timing lunar ... it's possible to convert Columbus's transatlantic distance ...
    (sci.archaeology)
  • Re: Columbus, eclipse, - deceit
    ... At Columbus time, ... weekend activity, turned em down. ... Eldest meanwhile of course went to Plan B. ...
    (soc.history.medieval)
  • Re: Columbus, eclipse, Regiomontanus
    ... At Columbus time, ... and their math correctly and knew it's size. ...
    (soc.history.medieval)
  • Re: Ken Towe on VM (Re: Vinland map and Historia Tartarorum, question
    ... > Does not effect timing, but it could mean he was measuring at a point ... The use of time difference to measure a position by longitude ... When Columbus gave a figure of 5 ... The distance from SI to CsV affects how large the earth is, ...
    (sci.archaeology)
Loading